CN109239708A - A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning - Google Patents

A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning Download PDF

Info

Publication number
CN109239708A
CN109239708A CN201811093928.3A CN201811093928A CN109239708A CN 109239708 A CN109239708 A CN 109239708A CN 201811093928 A CN201811093928 A CN 201811093928A CN 109239708 A CN109239708 A CN 109239708A
Authority
CN
China
Prior art keywords
power
way
splitters
antenna
orthogonal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811093928.3A
Other languages
Chinese (zh)
Inventor
马建国
杨自凯
周绍华
杨闯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
Original Assignee
Tianjin University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin University filed Critical Tianjin University
Priority to CN201811093928.3A priority Critical patent/CN109239708A/en
Priority to LU101016A priority patent/LU101016B1/en
Publication of CN109239708A publication Critical patent/CN109239708A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/032—Constructional details for solid-state radar subsystems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/347—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using more than one modulation frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/35—Details of non-pulse systems
    • G01S7/352—Receivers
    • G01S7/354—Extracting wanted echo-signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/415—Identification of targets based on measurements of movement associated with the target
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  using microwaves or terahertz waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
    • A61B5/1135—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing by monitoring thoracic expansion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/034—Duplexers

Abstract

The invention discloses a kind of double frequency circuit structures for realizing vital signs detecting and short distance positioning, receiving antenna connects No. four power splitters, No. four power splitter output ends are connected No. three bandpass filters, No.1 low-noise amplifier and No.1 orthogonal mixer all the way, and another way is connected No. four bandpass filters, No. two low-noise amplifiers and No. two orthogonal mixers；Transmitting antenna Series power amplifier, No. three power splitters, No. three power splitter connection No.1 power splitters and No. two power splitters；No.1 power splitter output end connects No. three power splitters all the way, and another way connects No.1 orthogonal mixer through No.1 bandpass filter；No. two power splitter output ends connect No. three power splitters all the way, and another way connects No. two orthogonal mixers through No. two bandpass filters.This invention simplifies the Doppler radar circuit structure for realizing vital signs detecting and short distance positioning, the Doppler radar circuit cost for realizing this two functions is reduced.

Description

A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning
Technical field
The present invention relates to vital signs detecting, short distance positioning and circuit fields, and more specifically, it relates to a kind of realizations The double frequency circuit structure of vital signs detecting and short distance positioning.
Background technique
Vital signs detecting and short distance positioning are current two very hot research directions, in consumer electronics, medical treatment prison Shield, auxiliary drive and the fields such as robot indoor navigation are widely used [1].Compared to traditional touch sensor and it is based on light According to sensor, microwave radar have the advantages that without contact, it is strong [2] independent of illumination and penetration power.But even so, Microwave radar still remains defect in terms of realizing vital signs detecting and short distance positioning at the same time.
Currently, the microwave radar structure of mainstream include single-frequency non-modulated continuous wave radar [3], pulse ultra-broad band radar [4], Frequency modulation continuous wave radar [5] and step frequency modulation continuous wave radar [6].The letter of single-frequency non-modulated continuous wave radar transmitting Number do not have certain bandwidth, therefore, it is difficult to obtain the absolute distance information of measured target.Pulse ultra-broad band radar, frequency modulation(PFM) Continuous wave radar and step frequency modulation continuous wave radar can obtain absolute distance information, but the distance of these types of radar is divided Resolution depends on the bandwidth of transmitting signal, and distance resolution is smaller, and required signal bandwidth is wider, and vital sign parameter signals are such as exhaled It is millimetre-sized for inhaling with chest cavity movement caused by heartbeat, in order to obtain vital sign information, it may be desirable to very wide bandwidth of operation, this The complexity and cost of radar circuit structure can be improved.
Deficiency based on existing radar arrangement, it is necessary to a kind of novel radar arrangement is proposed, to realize vital sign On the basis of detection and short distance positioning, the complexity and cost of radar are further decreased.
[bibliography]
[1]Peng Z, J M,Tang Y,et al.APortable FMCW Interferometry Radar with Programmable Low-IF Architecture for Localization, ISAR Imaging,and Vital Sign Tracking[J].IEEE Transactions on Microwave Theory&Techniques,2017,PP(99):1-11.
[2]Wang G,Gu C,Inoue T,et al.A Hybrid FMCW-Interferometry Radar for Indoor Precise Positioning and Versatile Life Activity Monitoring[J].IEEE Transactions on Microwave Theory&Techniques,2014,62(11):2812-2822.
[3]Li C,Yu X,Lee C M,et al.High-Sensitivity Software-Configurable 5.8-GHz Radar Sensor Receiver Chip in 0.13-μm CMOS for Noncontact Vital Sign Detection[J].IEEE Transactions on Microwave Theory&Techniques,2010,58(5): 1410-1419.
[4]Lai J C Y,Xu Y,Gunawan E,et al.Wireless Sensing of Human Respiratory Parameters by Low-Power Ultrawideband Impulse Radio Radar[J].IEEE Transactions on Instrumentation&Measurement,2011,60(3):928-938.
[5]Mitomo T,Ono N,Hoshino H,et al.A 77GHz 90nm CMOS Transceiver for FMCW Radar Applications[J].IEEE Journal of Solid-State Circuits,2009,45(4): 928-937.
[6]Mercuri M,Ping J S,Pandey G,et al.Analysis of an Indoor Biomedical Radar-Based System for Health Monitoring[J].IEEE Transactions on Microwave Theory&Techniques,2013,61(5):2061-2068.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of non-modulation continuous wave thunder of novel double-frequency Up to structure --- realize vital signs detecting and short distance positioning double frequency circuit structure, simplify realize vital signs detecting and The Doppler radar circuit structure of short distance positioning reduces the Doppler radar circuit cost for realizing this two functions, at this On the basis of circuit structure, the processing complexity of baseband signal is reduced.
The purpose of the present invention is what is be achieved through the following technical solutions.
The double frequency circuit structure of realization vital signs detecting and short distance positioning of the invention, including receiving antenna and transmitting Antenna, the receiving antenna are connected with No. four power splitters, and No. four power splitter output ends are divided into two-way, wherein successively going here and there all the way It is associated with No. three bandpass filters, No.1 low-noise amplifier and No.1 orthogonal mixer, another way has been sequentially connected in series No. four band logicals Filter, No. two low-noise amplifiers and No. two orthogonal mixers；The No.1 orthogonal mixer output end is connected separately with one Number analog-digital converter and No. two analog-digital converters, No. two orthogonal mixer output ends are connected separately with No. three analog-digital converters With No. four analog-digital converters；
The transmitting antenna connects power amplifier, and the power amplifier input is connected with No. three power splitters, institute It states No. three power splitter input terminals and is connected separately with No.1 power splitter and No. two power splitters, the No.1 power splitter input terminal is connected with No.1 local oscillator, No. two power splitter input terminals are connected with No. two local oscillators；
The No.1 power splitter output end is divided into two-way, wherein connecting No. three power splitter input terminals all the way, another way is through one Number bandpass filter is connected to No.1 orthogonal mixer input terminal；No. two power splitter output ends are divided into two-way, wherein all the way No. three power splitter input terminals are connected, another way is connected to No. two orthogonal mixer input terminals through No. two bandpass filters.
The No.1 power splitter, No. two power splitters and No. four power splitters are all made of the structure of input all the way, two-way output, institute State the structure that No. three power splitters are inputted using two-way, exported all the way.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) this invention simplifies circuit structures can since two frequencies that the radar generates all are continuous wave signals To generate using identical local oscillator, the complexity of radar arrangement is so reduced；
(2) since the structure complexity of circuit reduces, the cost of implementation of circuit is also reduced；
(3) it only needs to handle continuous wave signal in receiver section, without handling modulated signal, in contrast signal processing Complexity reduce it is very much；
(4) present invention can be realized simultaneously vital signs detecting and short distance positioning, and vital sign parameter signals can pass through two The signal of a frequency measures respectively；Range information can be acquired by the phase difference of signal similar in two frequencies, azimuth letter Breath can be measured by rotating radar system, and combined distance information and azimuth information can obtain short distance positioning information；
(5) present invention realizes that the core ideas of the dual-frequency radar is the letter using two frequencies of two local oscillators while generation Number, and launched the signal of two frequencies simultaneously by transmitting antenna.In receiving end, two are received simultaneously using receiving antenna The signal of a frequency separates the signal of two frequencies simultaneously using filter in order to which the signal to two frequencies is respectively processed It is mixed, obtained baseband signal is handled respectively finally.
Detailed description of the invention
Fig. 1 is the double frequency circuit structure schematic diagram that the present invention realizes vital signs detecting and short distance positioning；
Fig. 2 is the double frequency circuit structure domain that the present invention realizes vital signs detecting and short distance positioning.
Appended drawing reference: LO1 No.1 local oscillator, No. bis- local oscillators of LO2, Power Divider1 No.1 power splitter, Power No. bis- power splitters of Divider2, No. tri- power splitters of Power Divider3, No. tetra- power splitters of Power Divider4, PA power are put Big device, Tx_Antenna transmitting antenna, Rx_Antenna receiving antenna, BPF1 No.1 bandpass filter, No. bis- band logical filters of BPF2 Wave device, No. tri- bandpass filters of BPF3, No. tetra- bandpass filters of BPF4, LNA1 No.1 low-noise amplifier, No. bis- low noises of LNA2 Acoustic amplifier, Mixer1 No.1 orthogonal mixer, No. bis- orthogonal mixers of Mixer2, ADC1 No.1 analog-digital converter, ADC2 bis- Number analog-digital converter, No. tri- analog-digital converters of ADC3, No. tetra- analog-digital converters of ADC4.
Specific embodiment
Illustrate technical solution of the present invention in order to clearer, the present invention will be further explained below with reference to the attached drawings.It is right For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings His attached drawing.
The double frequency circuit structure of realization vital signs detecting and short distance positioning of the invention, complete circuit such as Fig. 1 institute Show, including receiving antenna Rx_Antenna and transmitting antenna Tx_Antenna.The receiving antenna Rx_Antenna is connected with four Number power splitter Power Divider4, No. four power splitters Power Divider4 output end are divided into two-way, wherein all the way according to It is secondary to be in series with No. three bandpass filter BPF3, No.1 low-noise amplifier LNA1 and No.1 orthogonal mixer Mixer1, another way It has been sequentially connected in series No. four bandpass filter BPF4, No. two low-noise amplifier LNA2 and No. two orthogonal mixer Mixer2.It is described No.1 orthogonal mixer Mixer1 output end is divided into two-way, wherein output end I is connected with No.1 analog-digital converter ADC1 all the way, separately Output end Q is connected with No. two analog-digital converter ADC2 all the way.No. two orthogonal mixers Mixer2 output end is divided into two-way, In all the way output end I be connected with No. three analog-digital converter ADC3, another output end Q is connected with No. four analog-digital converter ADC4.
The transmitting antenna Tx_Antenna connection power amplifier PA, the power amplifier PA input terminal are connected with No. three power splitter Power Divider3, No. three power splitters Power Divider3 input terminal is divided into two-way, wherein all the way Input terminal E is connected with No.1 power splitter Power Divider1, and another way input terminal F is connected with No. two power splitter Power Divider2.The No.1 power splitter Power Divider1 input terminal is connected with No.1 local oscillator LO1, No. two power splitters Power Divider2 input terminal is connected with No. two local oscillator LO2.
The No.1 power splitter Power Divider1 output end is divided into two-way, wherein output terminals A connects No. three function all the way Device Power Divider3 input terminal E, another output end B is divided to be connected to the orthogonal mixing of No.1 through No.1 bandpass filter BPF1 Device Mixer1 input terminal G.No. two power splitters Power Divider2 output end is divided into two-way, wherein output end C connects all the way It meets No. three power splitter Power Divider3 input terminal F, another output end D and is connected to No. two through No. two bandpass filter BPF2 Orthogonal mixer Mixer2 input terminal J.
No.1 power splitter Power Divider1, No. two power splitter Power Divider2 and No. four power splitters Power Divider4 is all made of the structure of input all the way, two-way output, and No. three power splitter Power Divider3 are used The structure that two-way is inputted, exported all the way.
In transmitting terminal, the frequency that No.1 local oscillator LO1 and No. two local oscillator LO2 are generated is respectively 1.67GHz and 2.06GHz, is The residual phase noise for minimizing baseband signal after mixing, uses same crystal oscillator to drive two pieces of local oscillators.Two generated Frequency signal is synthesized using No. three power splitter Power Divider3, passes through transmitting antenna Tx_ after power amplifier PA amplification Antenna launches.In receiving end, the signal received is first divided into two-way by No. four power splitter Power Divider4, it Pass through No. four bandpass filter BPF4 of No. three bandpass filters BPF3 and 2.06GHz that centre frequency is 1.67GHz respectively afterwards, Make the signal that a frequency is contained only in each receiving channel.Filtered signal wire is respectively through No.1 low-noise amplifier LNA1 Amplify with No. two low-noise amplifier LNA2, is then mixed with local oscillation signal.In order to solve Zeroes, using orthogonal mixed The mode of frequency generates the orthogonal baseband signal of two-way.Finally utilize analog-digital converter (No.1 analog-digital converter ADC1, No. two moduluses Converter ADC2, No. three analog-digital converter ADC3, No. four analog-digital converter ADC4) convert baseband signals into digital signal.
The mode that vital signs detecting is realized is specific as follows.Ignore amplitude variation, if the signal T (t) such as formula (1) of transmitting It is shown:
T (t)=cos (2 π ft+ φ (t)) (1)
In formula (1), f is the frequency for emitting signal, and t is the time, and φ (t) is residual phase.The chest cavity movement of people can be right Emit signal and generate modulating action, and makes to emit signal generation reflection.The reflection signal R (t) that receiving antenna receives such as formula (2) It is shown:
In formula (2), d0For the distance between radar and measured object, x (t) is the chest cavity movement of human body, and λ is transmitting signal Wavelength, c is the light velocity.After reflecting orthogonal with the local oscillation signal mixing of signal, obtained I channel baseband signal BI(t), the channel Q base Band signal BQ(t), respectively as shown in formula (3), (4):
In above formula (3), (4), Δ φ (t) is residual phase variable quantity.
Vital sign parameter signals are extracted using complex signal demodulation method, shown in the complex signal of reconstruction such as formula (5):
The implementation of short distance positioning is as follows.When the working frequency of the dual-frequency radar is f1And f2When, the distance letter of calculating Breath is as shown in formula (6):
In formula (6),WithTo be respectively f1、f2The baseband phase of frequency channel, m are an integer, RmaxFor most Big fuzzy distance.Azimuth information is measured by rotating radar system, and combined distance information and azimuth information can obtain Short distance positioning information.
Embodiment:
The circuit layout of design of the invention is as shown in Figure 2.The model of specifically used component is described below, No.1 local oscillator LO1 and No. two local oscillator LO2 is all made of the LTC6948IUFD of Analog Devices company, using the local oscillator generate 1.67GHz and The signal of two frequencies of 2.06GHz；No.1 power splitter Power Divider1, No. two power splitter Power Divider2, No. three Power splitter Power Divider3 and No. four power splitter Power Divider4 are all made of Anaren company PD0922J5050S2HF；Centre frequency is that the No.1 bandpass filter BPF1 and No. three bandpass filter BPF3 of 1.67GHz is adopted With the TQQ7303 of TriQuint company；Centre frequency is No. two bandpass filter BPF2 and No. four bandpass filters of 2.06GHz BPF4 is all made of the 856738 of TriQuint company；No.1 low-noise amplifier LNA1 and No. two low-noise amplifier LNA2 are adopted With the HMC618ALP3ETR of Analog Devices company；No.1 orthogonal mixer Mixer1 and No. two orthogonal mixers Mixer2 is all made of the LT5575EUF of Analog Devices company.
Although function and the course of work of the invention are described above in conjunction with attached drawing, the invention is not limited to Above-mentioned concrete function and the course of work, the above mentioned embodiment is only schematical, rather than restrictive, ability The those of ordinary skill in domain under the inspiration of the present invention, is not departing from present inventive concept and scope of the claimed protection situation Under, many forms can also be made, all of these belong to the protection of the present invention.

Claims (2)

1. a kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning, including receiving antenna (Rx_Antenna) With transmitting antenna (Tx_Antenna), which is characterized in that the receiving antenna (Rx_Antenna) is connected with No. four power splitters (Power Divider4), output end is divided into two-way to No. four power splitters (Power Divider4), wherein successively going here and there all the way It is associated with No. three bandpass filters (BPF3), No.1 low-noise amplifier (LNA1) and No.1 orthogonal mixer (Mixer1), it is another Road has been sequentially connected in series No. four bandpass filters (BPF4), No. two low-noise amplifiers (LNA2) and No. two orthogonal mixers (Mixer2)；No.1 orthogonal mixer (Mixer1) output end is connected separately with No.1 analog-digital converter (ADC1) and No. two Analog-digital converter (ADC2), No. two orthogonal mixers (Mixer2) output end are connected separately with No. three analog-digital converters (ADC3) and No. four analog-digital converters (ADC4)；
The transmitting antenna (Tx_Antenna) connects power amplifier (PA), power amplifier (PA) the input terminal connection Have No. three power splitters (Power Divider3), No. three power splitters (Power Divider3) input terminal is connected separately with one Number power splitter (Power Divider1) and No. two power splitters (Power Divider2), the No.1 power splitter (Power Divider1) input terminal is connected with No.1 local oscillator (LO1), and No. two power splitters (Power Divider2) input terminal is connected with No. two local oscillators (LO2)；
No.1 power splitter (Power Divider1) output end is divided into two-way, wherein connecting No. three power splitter (Power all the way Divider3) input terminal, another way are connected to No.1 orthogonal mixer (Mixer1) through No.1 bandpass filter (BPF1) and input End；No. two power splitters (Power Divider2) output end is divided into two-way, wherein connecting No. three power splitter (Power all the way Divider3) input terminal, another way are connected to No. two orthogonal mixers (Mixer2) through No. two bandpass filters (BPF2) and input End.
2. the double frequency circuit structure according to claim 1 for realizing vital signs detecting and short distance positioning, feature exist In the No.1 power splitter (Power Divider1), No. two power splitters (Power Divider2) and No. four power splitters (Power Divider4) is all made of the structure of input all the way, two-way output, No. three power splitters (Power Divider3) Using two-way input, all the way the structure exported.
CN201811093928.3A 2018-09-19 2018-09-19 A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning Pending CN109239708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201811093928.3A CN109239708A (en) 2018-09-19 2018-09-19 A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning
LU101016A LU101016B1 (en) 2018-09-19 2018-11-23 A double -frequency circuit structure for implementing vital sign detection and short-distance positioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811093928.3A CN109239708A (en) 2018-09-19 2018-09-19 A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning

Publications (1)

Publication Number Publication Date
CN109239708A true CN109239708A (en) 2019-01-18

Family

ID=65059073

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811093928.3A Pending CN109239708A (en) 2018-09-19 2018-09-19 A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning

Country Status (2)

Country Link
CN (1) CN109239708A (en)
LU (1) LU101016B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018516364A (en) * 2015-04-15 2018-06-21 日本テキサス・インスツルメンツ株式会社 Noise reduction in radar systems.
JP2018538539A (en) * 2015-12-18 2018-12-27 日本テキサス・インスツルメンツ株式会社 Circuit and method for determining chirp signal linearity and phase noise of FMCW radar
US20220192512A1 (en) * 2020-12-17 2022-06-23 National Sun Yat-Sen University Vital-sign radar sensor using wireless internet signals
CN114928370A (en) * 2022-04-22 2022-08-19 杭州中科微电子有限公司 Radio frequency structure applied to GNSS high-performance dual-frequency active antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513748A (en) * 1983-08-30 1985-04-30 Rca Corporation Dual frequency heart rate monitor utilizing doppler radar
CN107358776A (en) * 2017-08-23 2017-11-17 苏州豪米波技术有限公司 Heartbeat detection radar system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513748A (en) * 1983-08-30 1985-04-30 Rca Corporation Dual frequency heart rate monitor utilizing doppler radar
CN107358776A (en) * 2017-08-23 2017-11-17 苏州豪米波技术有限公司 Heartbeat detection radar system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BRIJESH IYER ET AL.: ""Dual-Input Dual-Output RF Sensor for Indoor Human Occupancy and Position Monitoring"", 《IEEE SENSORS JOURNAL》 *
曹国聪 等: ""基于双频连续波的微摄动目标探测算法"", 《雷达科学与技术》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018516364A (en) * 2015-04-15 2018-06-21 日本テキサス・インスツルメンツ株式会社 Noise reduction in radar systems.
JP2020180991A (en) * 2015-04-15 2020-11-05 日本テキサス・インスツルメンツ合同会社 Noise mitigation in radar systems
JP2021192057A (en) * 2015-04-15 2021-12-16 テキサス インスツルメンツ インコーポレイテッド Noise mitigation in radar systems
JP7327880B2 (en) 2015-04-15 2023-08-16 テキサス インスツルメンツ インコーポレイテッド Noise reduction in radar systems
JP2018538539A (en) * 2015-12-18 2018-12-27 日本テキサス・インスツルメンツ株式会社 Circuit and method for determining chirp signal linearity and phase noise of FMCW radar
US20220192512A1 (en) * 2020-12-17 2022-06-23 National Sun Yat-Sen University Vital-sign radar sensor using wireless internet signals
US11642033B2 (en) * 2020-12-17 2023-05-09 National Sun Yat-Sen University Vital-sign radar sensor using wireless internet signals
CN114928370A (en) * 2022-04-22 2022-08-19 杭州中科微电子有限公司 Radio frequency structure applied to GNSS high-performance dual-frequency active antenna

Also Published As

Publication number Publication date
LU101016B1 (en) 2019-06-28

Similar Documents

Publication Publication Date Title
CN109239708A (en) A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning
Li et al. A review on recent advances in Doppler radar sensors for noncontact healthcare monitoring
KR100624509B1 (en) Wireless detection system and method of heart rates
Mostafanezhad et al. Benefits of coherent low-IF for vital signs monitoring using Doppler radar
Ma et al. Design of a 100-GHz double-sideband low-IF CW Doppler radar transceiver for micrometer mechanical vibration and vital sign detection
Li et al. Recent advances in Doppler radar sensors for pervasive healthcare monitoring
CN105824020B (en) The continuous wave Doppler radar sensor of subcarrier modulation and movement demodulation method
TW201927233A (en) Non-contact self-injection-locked sensor
Avagyan et al. Portable non-contact microwave Doppler radar for respiration and heartbeat sensing
Jang et al. Wireless bio-radar sensor for heartbeat and respiration detection
Mostafanezhad et al. A coherent low IF receiver architecture for Doppler radar motion detector used in life signs monitoring
Choi et al. A remote compact sensor for the real-time monitoring of human heartbeat and respiration rate
US20200359930A1 (en) Non-contact self-injection-locked vital sign sensor
Mostafanezhad et al. An RF based analog linear demodulator
Ma et al. A 100-GHz double-sideband low-IF CW Doppler radar in 65-nm CMOS for mechanical vibration and biological vital sign detections
TWI682649B (en) Signal demodulation device with iq mixer and demodulated method thereof
LU101282B1 (en) Dual-band vital signs detection radar system based on superheterodyne and low-intermediate frequency structure
Chou et al. An X-band frequency-modulated continuous-wave radar sensor system with a single-antenna interface for ranging applications
CN109116309A (en) A kind of circuit structure simplifying double-side band Doppler radar using RF switch
TWI556797B (en) Motion/interference sensor
KR100665567B1 (en) Bio radar
Scheiner et al. Nothing beats SNR: Single-digit micrometer ranging using a low-power CW radar featuring a low-weight 3D-printed horn antenna
Tsai et al. A vital sign radar receiver with integrated A/D converter and dynamic clutter cancellation
Sutbas et al. A low-power V-band radar transceiver front-end chip using 1.5 V supply in 130-nm SiGe BiCMOS
Huang et al. Long-range Vital Sign Monitoring by Using a W Band Heterogeneously Integrated FMCW Radar Sensor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190118